Weak value amplification in a shot-noise limited interferometer
Quantum Physics
2012-06-26 v2
Abstract
We study the weak-value amplification (WVA) in a phase measurement with an optical interferometer in which shot noise limits the sensitivity. We compute the signal and the shot noise including the full-order interaction terms of the WVA, and show that the shot-noise contribution to a phase shift in a pointer variable is always larger than the final variance of the pointer variable. This yields difference in estimating noise level up to a factor of 1.5. To clarify an advantage for practical uses of the WVA, we discuss signal-to-noise ratio and its optimization in the presence of the shot noise.
Cite
@article{arxiv.1201.6039,
title = {Weak value amplification in a shot-noise limited interferometer},
author = {Atsushi Nishizawa and Kouji Nakamura and Masa-Katsu Fujimoto},
journal= {arXiv preprint arXiv:1201.6039},
year = {2012}
}
Comments
6 pages, 4 figures